var s_y,s_m,s_d;
function initSelectDate(d){
 var curDate=new Date();
 if (d!=null&&d.length>0)
 curDate=new Date(d.replace(/-/gi,"/"))
 s_y=document.getElementById("s_y");
 s_m=document.getElementById("s_m");
 s_d=document.getElementById("s_d");
 for (var i=1970;i<2050;i++){
  s_y.options.add(new Option(i,i))
  }
 for (var i=1;i<=12;i++){
  s_m.options.add(new Option(i,i));
  }
 s_y.onchange=function(){changeDate()};
 s_y.value=curDate.getFullYear();
 s_m.onchange=function(){changeDate()};
 s_m.value=curDate.getMonth()+1;
 changeDate(curDate.getDate())
}
function changeDate(defaultDate){
    var t;
    if (isFinite(defaultDate))
      t=defaultDate;
    else
      t=s_d.value;
    s_d.options.length=0;
    var j=0;
    switch(parseInt(s_m.value,10)){
      case 4:
      case 6:
      case 9:
      case 11:
        j=30;
        break;
      case 2:
        var y=s_y.value;
        if (y%4==0&&y%100!=0||y%400==0)
          j=29;
        else
          j=28;
        break;
      default:
        j=31;
    }
    for (var i=1;i<=j;i++)
      s_d.options.add(new Option(i,i));
    if (t!=""){
      if (t>j)
        s_d.value=j;
      else
        s_d.value=t;
    }
    else
      s_d.value=new Date().getDate();
}